Kirschvink, J.L. (1992). "Late Proterozoic low-latitude global glaciation: The snowball Earth". Trong Schopf, JW; Klein, C. (biên tập). The Proterozoic Biosphere: A Multidisciplinary Study(PDF). Cambridge University Press, Cambridge. tr. 51–2.
D.A.D. Evans (2000). "Stratigraphic, geochronological, and palaeomagnetic constraints upon the Neoproterozoic climatic paradox". American Journal of Science. Quyển 300 số 5. tr. 347–433. doi:10.2475/ajs.300.5.347.